The squish area that I should have is .61-.63mm but with a decked block and ceramic coated pistons it appears I will only have a squish area of .34mm, this possibly isn't enough. Now I understand the possibility of rod stretch at 5500rpm and expansion in the engine, but would 4340 h beam rods stretch as much as an oe rod ?
I may have to get a head gasket made up to allow for extra clearance but thought I would ask on here first as the worst that could happen is piston to head contact.
Think I should have removed material off the piston top...
Thanks in advance

The squish area that I should have is .61-.63mm but with a decked block and ceramic coated pistons it appears I will only have a squish area of .34mm, this possibly isn't enough. Now I understand the possibility of rod stretch at 5500rpm and expansion in the engine, but would 4340 h beam rods stretch as much as an oe rod ?
I may have to get a head gasket made up to allow for extra clearance but thought I would ask on here first as the worst that could happen is piston to head contact.
Think I should have removed material off the piston top...
Thanks in advance

Easiest solution,and perhaps cheapest would be to remove the coating,machine the pistons and then coat again
Almost no difference in stretch for the rods

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I would think that would be expensive, having a head gasket made would be cheaper, or make your own head gasket by using 2 different ones and making the thickness you need.

Nah,making a custom headgasket is not cheap,if you even find someone who does it
Many companies claim they can make custom headgaskets,but in reality they only do it in large quantities
Believe me,i have been down that route a few times before

Edit,i assume the measured squish is with the thickest headgasket......

On a serious note, though, i was interested to know about custom head gaskets as well, from what i have seen, you have to make your own, metal supply and machine shop supply companies can order you any thickness in copper, stainless, ect.. get the thickness you need and have a machine shop make it or you make it with some fineness and lots of measuring or just trace a head gasket and cut it out. high performance engine builds v8 and what not do it, why cant we? What about putting in fire rings on the head or block?
I was told that the measurement of the coating is nominal and not even worth measuring before and after.

Thanks for the input guys..Yes Martin is right I have made a gasket up with two gaskets in the past but I was trying to avoid this as it seems bad practice.
No I can't get a gasket made as it's not enough volume as I only want one.
I'm trying to keep it simple and if things go wrong (which they do for me) I want to go to an auto store and purchase off the self items. It's not always possible as that where I am now..I did think about topping the pistons but then I would have to do the valve reliefs and maybe the combustion bowl, again I may as well get some forge ones made to order as these will be lighter.
I bought the pistons and had them ceramic coated before the rotational stuff went for balancing just to spped things up a bit, thats where things have gone wrong. I've now stripped the head off the engine and rechecked the tolerances, I have a piston projection of 1.03mm and I have ordered another gasket so I can get a 0.2mm leaf out and then add it to the 1.43mm gasket.
I have done Two engine rebuilds last year of which both lasted a combined mileage of 1800 miles so this now better work as I could do a lot more with 20k gbp

On a serious note, though, i was interested to know about custom head gaskets as well, from what i have seen, you have to make your own, metal supply and machine shop supply companies can order you any thickness in copper, stainless, ect.. get the thickness you need and have a machine shop make it or you make it with some fineness and lots of measuring or just trace a head gasket and cut it out. high performance engine builds v8 and what not do it, why cant we? What about putting in fire rings on the head or block?
I was told that the measurement of the coating is nominal and not even worth measuring before and after.

I think imo that a copper gasket will always leak and the insertion of 'o' rings is a must but a v8 petrol has less compression over a diesel.
I'm running 18-18.5:1 as it is and I don't want to strip the thing down every year to replace a copper/stainless gasket because it leaks.

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Nah,making a custom headgasket is not cheap,if you even find someone who does it
Many companies claim they can make custom headgaskets,but in reality they only do it in large quantities
Believe me,i have been down that route a few times before

Edit,i assume the measured squish is with the thickest headgasket......

Take apart your new one and a used one, use one of the thinnest shims from the used one mixed in with the new gasket parts
they have a thick flat plate, then two bellevilled plates for sealing, then the thin flat shim plate for the various thickensses.

On a serious note, though, i was interested to know about custom head gaskets as well, from what i have seen, you have to make your own, metal supply and machine shop supply companies can order you any thickness in copper, stainless, ect.. get the thickness you need and have a machine shop make it or you make it with some fineness and lots of measuring or just trace a head gasket and cut it out. high performance engine builds v8 and what not do it, why cant we? What about putting in fire rings on the head or block?
I was told that the measurement of the coating is nominal and not even worth measuring before and after.

copper sucks
know why old engine guys do it? because composition gaskets suck even more

mls is god-tier
you can run stainless fire rings with MLS with lower than normal projection, my friend does it with his DSM making 1500ish hp from a 2 liter
needless to say he doesn't care about unimportant details like small coolant leaks